[Android Q&A, Help & Troubleshooting] mminbcn:
Rooting U8510 using the firmware from U8650

The method from mngt135 (http://xdaforums.com/showpost.php?p=16420786&postcount=3) is working perfectly, and so far the only one I could find working.

I just want to share my experience if it could be useful for you, since I did this process on more than one U8510 terminal.

I tested the method using both roms Malaysia and Yoigo and it works the same. There are other U8650 roms that do not work with this method.

The only difference I could find between Malaysia and Yoigo, was that Malaysia had an extra Keyword for Chinese, while Yoigo had only one "input method".

For this reason I preferred the Yoigo version (I don't write Chinese every day ;-).

Yoigo had a personalized startup logo, that I changed.

They both had all languages (BTW including Catalan which is one of the first Android phones with complete support).

The original links are broken but these still work:

U8650V100R001C223B826(Malaysia General):

http://www.multiupload.com/3BFFPUZOEO

U8650-1 V100R001C86B823SP05(Spain Yoigo)

http://www.mediafire.com/?78oha1q7z5cag16

* To flash the ROM (dload/update.app on Sdcard): remove the battery some 4 seconds, put it again, press Vol+ and Vol- and Power until you see the progress bar.

* To flash the update.zip: remove the battery some 4 seconds, put it again, press Vol+ and Power for some 14 seconds.

The Compass is working fine on both Roms. It just needs to be calibrated again, moving the telephone like an "8". To do so you can use an application called Compass (http://www.appbrain.com/app/compass/com.apksoftware.compass) and on the menu there is the option "calibrate".

What is not working is the front camera, the stock camera app does not have the option to switch cameras, since U8650 does only have one camera.

I don't know if it is only a limitation from the stock camera app or the rom will not allow using the front camera to any app. I remember that on the Huawei S7 tablet, using another Rom for root, to get back the Multi-touch hardware capacity was as simple as editing a .xml file.

I could not find any other compatibility problem for using the U8650 firmware.

The status / notification bar does not have any more the buttons GPS, WiFi, etc. It's not the same but I solved it using Extended Controls (http://www.appbrain.com/app/extended-controls/com.extendedcontrols) and setting a notification there.

There is a manual way to install gTalk with video (http://xdaforums.com/showthread.php?t=1056793)

But I didn't manage to make it work, on any camera. Anybody succeeded?

/cust is a partition for the carrier (i.e. Yoigo). You can install applications to /cust/app since this partition has free space.

The bootanimation and start logo is also there, but are not used. To change it, I had to follow this process written for the U8150: http://xdaforums.com/showthread.php?t=1014183

But the only tricky thing is editing with and Hex editor (like http://www.pendriveapps.com/hex-ed-portable-hex-editor/)

You can change the startup logo to write there your contact information in case it gets lost, because the logo is kept even after doing a normal hard reset.